Often, when people think of natural family planning, they think of the rhythm method. However, the rhythm method is a guessing game - guessing when ovulation will occur based on the length of the menstrual cycle. The Creighton Model system is different. It teaches the woman to identify when they are naturally fertile or infertile based on the observation of biological markers.
The Creighton Model is remarkably effective. A large study reported in the June 1998 Journal of Reproductive Medicine [LINK: http://www.reproductivemedicine.com/toc/auto_abstract.php?id=9549] revealed that this system has an effectiveness rate of 99.5 percent with perfect use and 96.8 percent with typical use. For couples who wanted to achieve pregnancy, the effectiveness rate is 76 percent in the first cycle of use and 98 percent by the sixth cycle. With the Creighton Model, an effectiveness of 96.8% is similar to that of birth control pills but with none of the potential side effects from the pill.
For couples dealing with infertility, the Creighton Model when used with NaProTECHNOLOGY is almost three times more successful than Invitro Fertilization for assisting infertile couples and does not result in early abortions or frozen embryos. Multiple pregnancy rates are ten times lower than that with artificial reproductive technologies.
The Creighton Model and NaProTECHNOLOGY are also highly effective for many woman's health concerns. It has a 95 percent success rate for treating PMS and a 95 percent success rate for treating postpartum depression.